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 <p><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">
<p style="margin: 0cm 0cm 0pt" class="MsoNormal"><span lang="EN-US"><o:p><font size="3" face="Calibri">&nbsp;</font></o:p></span></p>
<p style="margin: 0cm 0cm 0pt" class="MsoNormal"><strong><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">问题描述</span><span lang="EN-US"><o:p></o:p></span></font></strong></p>
<p style="text-indent: 21pt; margin: 0cm 0cm 0pt; mso-char-indent-count: 2.0" class="MsoNormal"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">公安人员审问甲、乙、丙、丁四个嫌疑犯，已确知，这四个人当中仅有一人是偷窃者，还知道这四个人的答话，要么完全诚实，要么完全说谎。在回答公安人员的问话中：</span><span lang="EN-US"><o:p></o:p></span></font></p>
<p style="text-indent: 21pt; margin: 0cm 0cm 0pt; mso-char-indent-count: 2.0" class="MsoNormal"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">甲说：&ldquo;乙没有偷，是丁偷的。&rdquo;</span><span lang="EN-US"><o:p></o:p></span></font></p>
<p style="text-indent: 21pt; margin: 0cm 0cm 0pt; mso-char-indent-count: 2.0" class="MsoNormal"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">乙说：&ldquo;我没有偷，是丙偷的。&rdquo;</span><span lang="EN-US"><o:p></o:p></span></font></p>
<p style="text-indent: 21pt; margin: 0cm 0cm 0pt; mso-char-indent-count: 2.0" class="MsoNormal"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">丙说：&ldquo;甲没有偷，是乙偷的。&rdquo;</span><span lang="EN-US"><o:p></o:p></span></font></p>
<p style="text-indent: 21pt; margin: 0cm 0cm 0pt; mso-char-indent-count: 2.0" class="MsoNormal"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">丁说：&ldquo;我没有偷，我用的那东西是我家里的。&rdquo;</span><span lang="EN-US"><o:p></o:p></span></font></p>
<p style="text-indent: 21pt; margin: 0cm 0cm 0pt; mso-char-indent-count: 2.0" class="MsoNormal"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">请根据上述四人答话，判断谁是偷窃者。</span><span lang="EN-US"><o:p></o:p></span></font></p>
<p style="text-indent: 21pt; margin: 0cm 0cm 0pt" class="MsoNormal"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">输入格式：无输入。</span><span lang="EN-US"><o:p></o:p></span></font></p>
<p style="text-indent: 21pt; margin: 0cm 0cm 0pt" class="MsoNormal"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">输出格式：输出一个字符，表示偷窃者是谁，</span><span lang="EN-US"><font face="Calibri">A</font></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">表示甲，</span><span lang="EN-US"><font face="Calibri">B</font></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">表示乙，</span><span lang="EN-US"><font face="Calibri">C</font></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">表示丙，</span><span lang="EN-US"><font face="Calibri">D</font></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">表示丁。</span><span lang="EN-US"><o:p></o:p></span></font></p>
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